upstream water

基本解释

Under the drop down condition of the upstream water level, the calculated results compare fairly well to the test results.
计算与试验对比表明，无论是上游水位骤升还是突降，两者基本上一致。
With the upstream water level reducing and the downstream water level increasing, the highest tangent velocity also moving to the pipe center.
随上游水位的降低及下游水位的升高，切向流速最大值点也不断向管中心一侧移动。
Sustained drought and insatiable upstream water demand have drained Lake Mead to the point that experts are predicting it may soon be shallow enough to be in deep trouble.
持续的干旱和上流不断增加的水需求已经使米德湖快要陷入专家预测中可能造成麻烦的低点。

Water quality issues also create risk for companies, from stricter pollution standards on their own effluent to other entities polluting water upstream, requiring them to clean up water prior to use.
FORBES: A New Tool To Manage Companies' Growing Water Risks
The Aral Sea was dried up by upstream diversions of water for vast areas of irrigation.
ECONOMIST: Letters
Further complicating the matter is the use of river water upstream for agricultural irrigation.
ECONOMIST: Saving the fish of the Klamath river